2.
Write a sample file to tape, using ‘
tar
’:
% cd /% tar cvf
<device_file> <file>
The options to
tar
have the following meanings:
Create a new archive (backup file) on the device.
c
Operate in verbose mode.
v
Specify the device file explicitly.
f
The arguments follow the
cvf
options in the command line. Their values depend on the operating
system; suggested values are given the appropriate operating system chapter. The arguments
are as follows:
The name of the device file for the drive.
nl
Example:
/dev/rmt/c4t3d0BESTnb
<device file>
The name of the file to archive, prefixed with ‘
./
’.
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Example:
./stand/vmunix
<file>
NOTE:
Make sure you prefix the file name with ‘
.
’ when you back it up to tape. If you do not, the
restore operation in step 3 will overwrite the original copy on disk.
3.
Read the file back from tape:
% cd /tmp % tar xvf
<device file>
The ‘
x
’ option to
tar
here means “extract from the archive”.
Use the same value for the
<device file>
argument as in step 2.
4.
Compare the original with this retrieved file:
% cmp
<original file>
/tmp/
<retrieved file>
This compares the files byte by byte. If they are the same, there should be no output, and this
verifies that the installation is correct. The arguments are:
The name of the original file, prefixed with ‘
/
’.
nl
Example:
/stand/vmunix
<original file>
The name of the file retrieved from the archive.
nl
Example:
stand/vmunix
<retrieved file>
Example
Suppose you are verifying the installation of an HP LTO Ultrium tape drive on an HP-UX 11.X system.
The procedure would be as follows:
Verifying the installation
32
